Perhaps you should try some spelling variations:
"implement routing algorithm" » "implement cosine algorithm" (Expand Search), "implemented routing algorithm" (Expand Search), "implementing routing algorithm" (Expand Search)
"element both algorithms" » "elements both algorithms" (Expand Search)
"element study algorithm" » "elements study algorithm" (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("implement routing algorithm") OR ((("element both algorithms") OR ("element study algorithm"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"implement routing algorithm\") OR (((\"element both algorithms\") OR (\"element study algorithm\"))))".
• Removing quotes may allow a broader search: (( implement routing algorithm ) OR ((( element both algorithms ) OR ( element study algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("implement routing algorithm") OR ((("element both algorithms") OR ("element study algorithm"))))*.